/Engine/Plugins/Enterprise/DatasmithImporter/Source/DatasmithImporter/Public/ObjectElements/DatasmithUSceneElement.h
Create an array with all the Mesh in the Datasmith scene. Use CreateMesh -or- RemoveMesh to modify the Datasmith scene.
[UFUNCTION](Programming/UnrealArchitecture/Reference/Functions)(BlueprintCallable, Category="Datasmith | Scene") [TArray](API\Runtime\Core\Containers\TArray)< [UDatasmithMeshElement](API\Plugins\DatasmithImporter\ObjectElements\UDatasmithMeshElement) * > GetMeshes()